to choose what to build as a virtual circuit, and what I should just leave
in code. I have two motors that run based on a countdown timer. I set the
value of the countdown object, and the motors run until the countdown
reaches 0. There are also 24 touch switches. My intention is that if one of
the switches is triggered, the countdown value is set to 0, thereby
switching off the motors immediately. I was figuring that this "reflex"
should be among the fastest things to happen, so I thought I might create a
VC for the switches. However, the switches are read from an I2C object, and
those can't be included in a VC directly. Therefore, I thought I would read
the three banks of switches into three bytes (I have to do this anyways,
because I need the bytes). Then the VC would use three oCompare0 objects to
check whether any of the bytes are above 0. An oGate3 object will OR the
three oCompare0.Above properties and trigger an oEvent based on whether the
oGate3 results in True or False.
However, the event triggered by the oEvent clears the counters, and sends
some information out the serial port. None of that is VC, but it has to
happen. It would be a bit more difficult to try to put the clearing of the
countdown timer into the VC, and I'm already pushing the limit of the object
memory, so I didn't seriously consider doing it.
My problem is that even this VC is gobbling up about 20 bytes, or about 25%
of the object memory, which appears to be acceptable, though only marginally
so. I don't have the event quite working yet (v B2.2+, so I don't have the C
oEvent bug), but I'm uncertain whether it's even worth doing. Considering
that reading the I2C into the three bytes is not part of the VC, and that
the event itself, where the countdown is cleared (in certain situations
only, so there are two if statements prior to the clearing of the value), is
not part of the VC, will I actually see much of a speed boost versus the
single line:
if alert1 > 0 or alert2 > 0 or alert3 > 0
which is all I am really replacing with the three oCompare objects and the
oEvent.
--
View this message in context: http://www.nabble.com/Question-about-event-design-tp16385531p16385531.html
Sent from the OOPic mailing list archive at Nabble.com.
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